src/token.cpp


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80

#include "token.h"

#include "number.h"
#include <bu/formatter.h>
#include <bu/string.h>

Token::Token() :
    eType( tUninitialized ),
    sVal( 0 )
{
}

Token::Token( Type eType ) :
    eType( eType ),
    sVal( 0 )
{
}

Token::Token( Type eType, Bu::String *s ) :
    eType( eType ),
    sVal( s )
{
}

Token::Token( Type eType, Number *n ) :
    eType( eType ),
    nVal( n )
{
}

Token::Token( const Token &rSrc ) :
    eType( rSrc.eType ),
    sVal( rSrc.sVal )
{
    Token &rMod = const_cast<Token &>(rSrc);
    rMod.sVal = 0;
}

Token::~Token()
{
    switch( eType )
    {
        case tNumber:
            delete nVal;
            break;

        case tVariable:
        case tCommand:
        case tString:
            delete sVal;
            break;

        default:
            break;
    }
}

Bu::Formatter &operator<<( Bu::Formatter &f, Token::Type eType )
{
    switch( eType )
    {
        case Token::tNumber:        return f << "num";
        case Token::tVariable:      return f << "var";
        case Token::tCommand:       return f << "cmd";
        case Token::tPlus:          return f << "+";
        case Token::tMinus:         return f << "-";
        case Token::tDivide:        return f << "/";
        case Token::tMultiply:      return f << "*";
        case Token::tModulus:       return f << "%";
        case Token::tOpenParen:     return f << "(";
        case Token::tCloseParen:    return f << ")";
        case Token::tEquals:        return f << "=";
        case Token::tString:        return f << "str";
        case Token::tEndOfLine:     return f << "eol";
        case Token::tEndOfInput:    return f << "eoi";

        default:                    return f << "???";
    }
}